ALSA: hda - disable amp override on non-HP machines

Some machines with Cx5045 seem to have no problem with the volume
over 0dB on NID 0x17.  Disable amp overrides for other devices but HP.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index e3df8ac..64df810 100644 (file)
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1005,15 +1005,19 @@ static int patch_cxt5045(struct hda_codec *codec)
 #endif 
        }
 
-       /*
-        * Fix max PCM level to 0 dB
-        * (originall it has 0x2b steps with 0dB offset 0x14)
-        */
-       snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,
-                                 (0x14 << AC_AMPCAP_OFFSET_SHIFT) |
-                                 (0x14 << AC_AMPCAP_NUM_STEPS_SHIFT) |
-                                 (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) |
-                                 (1 << AC_AMPCAP_MUTE_SHIFT));
+       switch (codec->subsystem_id >> 16) {
+       case 0x103c:
+               /* HP laptop has a really bad sound over 0dB on NID 0x17.
+                * Fix max PCM level to 0 dB
+                * (originall it has 0x2b steps with 0dB offset 0x14)
+                */
+               snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,
+                                         (0x14 << AC_AMPCAP_OFFSET_SHIFT) |
+                                         (0x14 << AC_AMPCAP_NUM_STEPS_SHIFT) |
+                                         (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) |
+                                         (1 << AC_AMPCAP_MUTE_SHIFT));
+               break;
+       }
 
        return 0;
 }